90211359 divided by 66 
We're looking to find how many times 66 goes into 90211359.

Advancing to step 1:
9 divided by 66 is 0 with a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Append the next digit (0) from the dividend to 9 and continue with: 90 / 66

On to step 2:
90 divided by 66 is 1 with a remainder of 24.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 24 after subtracting 66 from 90.
Fetch the next digit (2) from the dividend, attach it to 24 and continue: 242 / 66

Step 3:
242 divided by 66 is 3 with a remainder of 44.
Record the quotient 3 as the next digit in the result. 
Result so far: 13.0
The remainder is 44 after subtracting 198 from 242.
Take the next digit (1) from the dividend and append it to 44, then repeat: 441 / 66

Step 4:
When dividing 441 by 66, we get 6 with a remainder of 45.
Write down 6 as next digit of the result. 
Result so far: 136.0
Subtract 396 from 441 to get 45.
Grab the next digit (1) from the dividend, add it to 45, then carry on: 451 / 66

On to step 5:
If we divide 451 by 66, we get 6 and a remainder of 55.
The next digit of our result is 6. 
Result so far: 1366.0
If we subtract 396 from 451, we get 55.
Fetch the next digit (3) from the dividend, attach it to 55 and continue: 553 / 66

Advancing to step 6:
66 goes into 553 8 times with a remainder of 25.
Put 8 as the next digit of the answer. 
Result so far: 13668.0
Deduct 528 from 553 and we're left with 25.
Bring next digit (5) of the dividend behind the 25 and repeat the process: 255 / 66

On to step 7:
The number 66 fits into 255 3 times, leaving a remainder of 57.
The next digit of our result is 3. 
Result so far: 136683.0
Subtract 198 from 255 to get 57.
Include the next digit (9) from the dividend after 57, then repeat: 579 / 66

Step 8:
66 can be fit into 579 8 times, resulting in a remainder of 51.
The next digit of our result is 8. 
Result so far: 1366838.0
If we take 528 away from 579, we end up with 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Let's proceed to step 9:
If we divide 510 by 66, we get 7 and a remainder of 48.
Write down 7 as next digit of the result. 
Result so far: 1366838.7
Subtracting 462 from 510 leaves us with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Going ahead to step 10:
When dividing 480 by 66, we get 7 with a remainder of 18.
Put 7 as the next digit of the answer. 
Result so far: 1366838.77
Deduct 462 from 480 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

The final outcome is 1366838.77, with a leftover of 0.018.